Portal:Energy

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The Energy Portal
Welcome to Wikipedia's Energy portal, your gateway to energy. This portal is aimed at giving you access to all energy related topics in all of its forms. 		Page contents: Selected article • Selected image • Selected biography • Did you know? • General images • Quotations • Related portals • Wikiprojects • Major topics • Categories • Help • Associated Wikimedia

Introduction

A plasma globe, using electrical energy to create plasma, light, heat, movement and a faint sound

In physics, energy (from Ancient Greek ἐνέργεια (enérgeia) 'activity') is the quantitative property that is transferred to a body or to a physical system, recognizable in the performance of work and in the form of heat and light. Energy is a conserved quantity—the law of conservation of energy states that energy can be converted in form, but not created or destroyed. The unit of measurement for energy in the International System of Units (SI) is the joule (J).

Common forms of energy include the kinetic energy of a moving object, the potential energy stored by an object (for instance due to its position in a field), the elastic energy stored in a solid object, chemical energy associated with chemical reactions, the radiant energy carried by electromagnetic radiation, and the internal energy contained within a thermodynamic system. All living organisms constantly take in and release energy.

Due to mass–energy equivalence, any object that has mass when stationary (called rest mass) also has an equivalent amount of energy whose form is called rest energy, and any additional energy (of any form) acquired by the object above that rest energy will increase the object's total mass just as it increases its total energy.

Human civilization requires energy to function, which it gets from energy resources such as fossil fuels, nuclear fuel, or renewable energy. The Earth's climate and ecosystems processes are driven by the energy the planet receives from the Sun (although a small amount is also contributed by geothermal energy). (Full article...)

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Selected article

The Northwest Exelon Pavilion is the Millennium Park Welcome Center and houses the park's office.

The Exelon Pavilions are four buildings that generate electricity from solar energy and provide access to underground parking in Millennium Park in the Loop community area of Chicago in Cook County, Illinois, United States. The Northeast Exelon Pavilion and Northwest Exelon Pavilion (jointly the North Exelon Pavilions) are located on the northern edge of the park along Randolph Street, and flank the Harris Theater. The Southeast Exelon Pavilion and Southwest Exelon Pavilion (jointly the South Exelon Pavilions) are located on the southern edge of the park along Monroe Street, and flank the Lurie Garden. Together the pavilions generate 19,840 kilowatt-hours (71,400 MJ) of electricity annually, worth about $2,350 per year.

The four pavilions, which cost $7 million, were designed in January 2001; construction began in January 2004. The South Pavilions were completed and opened in July 2004, while the North Pavilions were completed in November 2004, with a grand opening on April 30, 2005. In addition to producing energy, three of the four pavilions provide access to the parking garages below the park, while the fourth serves as the park's welcome center and office. Exelon, a company that generates the electricity transmitted by its subsidiary Commonwealth Edison, donated $5.5 million for the pavilions. Chicago Tribune architecture critic Blair Kamin praised the South Pavilions as "minor modernist jewels", but criticized the North Pavilions as "nearly all black and impenetrable". The North Pavilions have received the Leadership in Energy and Environmental Design (LEED) silver rating from the United States Green Building Council, as well as an award from the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE). (Full article...)

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Did you know?

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Selected biography

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Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman who developed many devices which greatly influenced life worldwide into the 21st century. Dubbed "The Wizard of Menlo Park" by a newspaper reporter, he was one of the first inventors to apply the principles of mass production to the process of invention, and can therefore be credited with the creation of the first industrial research laboratory.

Edison invented the first commercially practical electric light bulb which, by 1879 would burn for hundreds of hours. He was able to sell the concept to homes and businesses by mass-producing them and creating a complete system for the generation and distribution of electricity.

Edison patented an electric distribution system in 1880, and in January 1882 he switched on the first steam generating power station at Holborn Viaduct in London, UK. The direct current (DC) supply system provided electricity supplies to street lamps and a number of private dwellings within a short distance of the station. The first investor-owned electric utility, Pearl Street Station, New York City, started generating on September 4, 1882, providing 110 volts direct current to 59 customers in lower Manhattan.

Life magazine (USA), in a special double issue, placed Edison first in the list of the "100 Most Important People in the Last 1000 Years," noting that the light bulb he promoted "lit up the world." He was ranked thirty-fifth on Michael H. Hart's list of the most influential figures in history.

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In the news

1 June 2024 – Russian invasion of Ukraine
Russia launches missile and drone strikes across Ukraine, injuring at least four people and damaging critical infrastructure, including energy facilities. Ukraine says that it shot down 35 of 53 missiles and 46 of 47 drones. (Reuters)

General images

The following are images from various energy-related articles on Wikipedia.
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Quotations

  • "Without radical international measures to reduce carbon emissions within the next 10 to 15 years, there is compelling evidence to suggest we might lose the chance to control temperature rises. Failure to act will make an increase of between 2 and 5 degrees [3.6 - 9°F] in average temperatures almost inevitable." – Tony Blair, 2006
  • "The question is not whether climate change is happening or not, but whether, in the face of this emergency, we ourselves can change fast enough." – Kofi Annan, 2006
  • "I promise you a day will come when our children and grandchildren will look back and they will ask one of two questions. Either they will ask, 'What in God's name were they doing? Didn't they see the evidence?' Or, they may look back and say 'How did they find the uncommon moral courage to rise above politics and redeem the promise of American democracy?'" – Al Gore, 2007, on global warming.
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